Hard shell knee cap



FIG. 1 is a perspective view of a hard shell knee cap, showing my design;

FIG. 2 is bottom end view;

FIG. 3 is a right-side elevation view;

FIG. 4 is a top end view;

FIG. 5 is a left side elevation view;

FIG. 6 is front elevation view; and,

FIG. 7 is a rear elevation view.

The broken line portion of the figure drawings is included to show portions of the article that form no part of the claimed design. 

CLAIM I claim the ornamental design for a hard shell knee cap, as shown and described. 